Coffee-machine.



U. NELSON.

COFFEE MACHINE.

APPLICATION FILED APR.24,1907.

1,057,764, I Patented Ap r.1,1913.

MJZZZ v 6% A t torneys.

Witnesses CHARLES NELSON, OF BROOKLYN, NEW YORK, ASSIGNOE 1'0 $3.STERNAU '52 60., OF NEW YORK, N. Y., A COPAETNERSH IP CONFUSED 0ESIGMUE'D STERNAU AND LIONEL STRASSIBUBGER, OF NEW YORK, N. "3?. r

' corms-momma. v

To all whom it may concern:

subject of' the King 0 and State ofNew York, have Invented anImprovement inCofiee-Machines, (Case A,)

of which the following is a specification.

The object I have in view is the production of a machine for makingcoffee or an infusion from coffee, tea and other materials for theproduction of a beverage or for other analogous purposes, which machinewill have advantages over others heretofore produced.

The particular advantages I seel; to secure are to produce a maohlnewhich Wlll cause a percolating action in a very short time after heathas been applled and before the water. in the receptacle has been raisedappreciably in temperature.

Other objects lie in producing a device which may be readily cleaned,which Wlll have no loose parts or valves, and will be cheaptomanufacture.

I attain these objects by the mechanism illustrated in the accompanyingdrawings. Figure 1 is a section of a portion of a cofiee machine showingone embodiment of the invention. Fig. 2 is an enlarged sec- Fig. 5 is asectional view tional view of the percolator shown in Fig. 1. Fig. 3 isa bottom viewof the upper plate of the percolator. Fig. 4 is a top viewof the lower plate of the same, and of a modification. In all of theviews like parts are designated by the same' reference characters.

In carrying out my invention I provide the usual receptacle 1 forcontaining the water and infusion after such is made; a

screen 2 for containing the substance of which the infusion is made; anda globe 3, above the screen. The screen 2 has a central opening, throughwhich the tube 4 of the percolator 5 passes. The tube 4 extends asufiicient distance above the screen 2 so that the liquid water andessence after the latter is formed will strike against the deflector 6,and be splattered outward and sprinkled downward upon the contents ofthe screen, soakin through the latter and 1 producing the in sion.

-. The tube 4 is vertical and its lower end open and communicates with achamber Specification of Iiettere are.

Application filed April 2a, 1907. Serial no. aeaeei.

as by being Patented Apr. 1, 1191.3.

7. This chamber is cylindrical in construc- Be it known that I CnannusNunsoma Sweden, residing inthe borough of'Brooklyn, county of Kings,

edge is provided with a plate 8, for convecting the heat of the lampagainst the walls of the chamber 7, thus concentrating the heat aboutthe chamber and for keeping the bottom of the receptacle cool. The topof the chamber 7 is closed by the percolator 5. The body of the chambercommunicates with the receptacle 1 by means of a passage 9 formed in aportion of the percolator. This passage is in the form of a spiral. Thisspiral passage is not necessarily made in the percolator; it may be madeof a tube 10, as shown in Fig. 5, such tube being spirally coiled aroundthe bore of the tube 4. In this construction the bottom of the tube 4;engages with a tubular fitting 11, forming the bottom of the percolator;this fitting is tightly connected, such screwed into the top of thechamber 7 so that no liquid can enteror leave the chamber at the joint.One end of the tube 10 communicates with this fitting, the other end isopen. The spiral coil is formed upon substantially a horizontal plane sothat the free and open end of the tube 10 will be as near the bottom ofthe receptacle 1 as is possible. In the other figures of the drawing thepassage '9 is formed by means of the plates 12 and 13. The passage ispreferably cut out of one of the plates, thus forming the sides andbottom or top wall of the passage, the other plate forming the fourthwall. The reasons for this arrangement will appear later.

As shown in Fig. 2, the plate 13 is permanently secured to the tubularfitting 11, through a central opening 13. The plate 12, (in theembodiment chosen for illustration) has the spiral groove and isremovably secured to the tubular fitting, such fittin having screwthreads formed upon it, wit which the central opening 12 of the plate 12engages. The periphery of the plate 12 is milled, as is shown in Fig. 2.By screwing the plate 12 so that it comes in close engagement with theplate 13, an inclosed spiral passage is formed between the two plates,such passage being open at its periphery to communicate with theinterior of th receptacle 1 and also open at its tuner ting in thecentral opening of the plate 12,

is avoided. ln addition to the opening 1&, which is made transverselythrough the side walls of the tubular fitting 11, an additional opening15 may be employed. This is for the purpose of securing an increasedcross section of the opening. One or the other of the openings 1% and 15may be used or employed if desired when one alone is. found to beinadequate. j

The operation is as follows: The receptacle 1 being partly filled withwater and the substance of which it is desired to secure the essencebeing placed within the screen 2, the plate 8 and bottom of the ob amber7 are heated, preferably by the, usual spirit lamp. The chamber 7 willbe filled with water which will enter through the passage 9. The chamber7 being of relatively small capacity and the plate 8 convecting' andconcentrating the heat to the chamber, and at the same time preventingheat from reaching the receptacle, the water within the chamber willbecome immediately heated and a portion of it converted into steam. Asthe steam expands it will drive the water therein and in the tube 4upward and divert it against the deflector 6, and will spray it over thematerial in the screen 2, which will form the essence, which will flowback into the receptacle 1. The spiral passage 9 oii'ers a resistance tothe liquid to leave the chamber 7, which is greater than the resistanceoilered by the straight tube 4; consequently, there being lessresistance in the tube 4 than in the spiral passage 9, the greaterportion of the liquid will be driven-up through the tube 4. After thisebullition the liquid in the tube 4' will rise again to its normallevel, which will be the level of the liquid vithin the receptacle 1, orslightly above the same, caused by the capillary effect in the tube 4:,and fresh liquid will nter the chamber 7 through the spiral passage. Theoperation will be repeated as soon as the contents of the chamber 7 canbecome sulliciently hot to cause the expansion and the driving upward ofthe liquid in the tube 4:- I have found that in practice, having coldwater anda spirit lamp, the liquid will be raised in the tube t againstthe deflector 6 in somewhat less than a minute and a quarter.

By my construction, a simple, cheap and effective device is produced,which has no moving parts and which may be readily cleansed.

I have described my invention in conncction with a colicc machine inwhich heat is applied by means of a lamp, but it is to be understoodthat the invention may be applied to any other form of coffee machine,such as one for use with an ordinary stove, in which form the devicewill be similar to a coffee pot.

The broad feature of the invention consisting of a spiral orlabyrinthine passage between the heating chamber and the receptacle isnot claimed herein, but. forms the subject-matter of other co-pendingapplications.

Y In accordance with the provisions of the patent statutes, I havedescribed the principle of my invention, together with the apparatuswhich I now consider to represent the best embodiment thereof; but Idesire to have it understood that the apparatus shown is merelyillustrative and that the invention can be carried out in other ways.

Having now particularly described the nature of my invention, and inwhat manner the same is to be performed, what I claim and desire tosecure by Letters Patentis:

.1. A coffee machine having a receptacle and anopenended chamber, apercolator tube removablv connected with the chamber, the said tubecarrying an enlargement, said enlargement lying in the receptacle. saidenlargement being provided with an inclosed, open-ended, spiral passage,one extremity thereof comniunicating with the receptacle and the otherextremity communicating with the chamber.

2. A cofiee machine, having a. heating chamber, a percolator comprisinga tube, a

disk secured to the tube, there being a perforation through the disk, inline with the tube, a second disk secured to the tube and in contactwith the first disk, and having a. perforation in line with the tube,there being a spiral groove in the face of one of the disks, injuxtaposition to the other disk, the said groove extending from theperiphery of the disk inward to the tube, and in communication with theheating chamber.

3. A coffee machine. having a heating chamber, a percolator comprising atube, a disk secured to the tube. there being a perforation through thedisk in line-with the tube a second disk. also having a. pert-Torationin line with the tube. there being a spiral groove in the face of one ofthe disks, and means for removably securing the second disk in contactwith the first disk, to inclose the groove, and produce a passage fromthe peripheries of the disks inward to the tube, and in communicationwith the heating chamber.

4. A coffee machine having a receptacle ably connected to I municatingwith the heating chamber.

5. A percolator for a coffee machine, which comprises a tube, a memberpermanently'secured to the tube, a second member removably secured tothe tube and abutting against the first member, one of the membershaving a s iral oove in its face, which abuts against .t e 0t er member,such other member inclosing one side of the groove and forming thereby aclosed splral passage.

6. A coffee machine, comprising a main vessel, a heating chamberassociated therewith and having an-0utlet-part,extending into saidvessel, a percolating tube, a container for coffee, associated with saidtube, there being withm said vessel '21 member 7 provided with spacedwalls and having an inlet opening into the spaces between said walls, asecond member associated with'said tube and adapted to seat, againstsaid first member and engaging said walls, and means whereby said twomembers can be removably connected, the spaces between said wallsconstituting a passage through which fluid can pass from said vesselinto said heating chamber.

7; A cofiee machine, having a receptacle; a heating chamber extendingbelow the re-,

ceptacle; a vertical pe'rcolator tube, connected to and communicatingwith the chamher; a horizontal disk-like member, made of two abuttingarts, and lying within the receptacle, and having a horizontal spiralpassage open at its outer end within the rece tacle, and delivering, atits inner end, t e liquid to the heating chamber.

- 8. A coffee machine, having a receptacle; a heating chamber extendingbelow the receptacle; a vertical percolator tube, connected to andcommunicating with the cham-' her; a horizontal disk-like member, madeof two abutting parts,and lying within the receptacle, and having ahorizontally spiral passage open at its outer end within the receptacle,and delivering, at its inner end, the liquid to the heating chamber, thepassage being formed wholly within one of the members.

This specification signed and witnessed this 22nd day of April, 1907.

CHARLES -NELSON.-

Witnesses:

Jomt L. LO'ISCH, Enwann IBMscHER,

